Species Card of Copepod
Cyclopoida ( Order )
    Oncaeidae ( Family )
        Oncaea ( Genus )
Oncaea parila  Heron, 1977   (F,M)
Syn.: Oncaea notopus : Sars, 1900 (p.107, figs.F); Tanaka, 1960 (p.70, figs.F, M, Juv.); ? Kosobokova & Hirche, 2000 (p.2029, tab.2)
Ref.:
Heron, 1977 (p.65, Descr.F, figs.F); Heron & al., 1984 (p.456, 470, Descr.M, figs.M); Bradford-Grieve & al., 1999 (p.887, 970, figs.F,M); Heron & Frost, 2000 (p.1042, figs.F, tab.2, 3)
Species Oncaea parila - Plate 1 of morphological figuresissued from : G.A. Heron & B.W. Frost in Proc. Biol. Soc. Washington, 2000, 113 (4). [p.1041, Fig.14, I].
Female (from NE Pacific): I, pediger 4 posterior corner, segment of P5 and genital segment (lateral; scale bar: x).
Scale bars: 0.1 mm, see figures 3, 4, 5, 10 of Heron and Frost, 2000 for Oncaea canadensis and Oncaea insolita.

Nota: The P5 of O. parila and O. notopus, both with the lengths of the two terminal setae being approximately equal, display one of the characters useful in distinguishing each of them from other similar species. O. notopus differs from O. parila by a greater size and the relatively longer spines on exopods and endopods of P1-P4.


Species Oncaea parila - Plate 2 of morphological figuresissued from : G.A. Heron & B.W. Frost in Proc. Biol. Soc. Washington, 2000, 113 (4). [p.1022, Fig.2, C].
Female: P2-P4 endopod terminal ''spine set'' (combination of the lengths, shapes, and position of the three or two terminal spines on the endopods of swimming legs 2-4, from left to right in figure, for different Oncaea' species).

Nota: endopod of P4 with subterminal spine half the length of terminal spine and lateral spine longer than P3 terminal spine.


Species Oncaea parila - Plate 3 of morphological figuresissued from : G.A. Heron in Antarct. Res. Ser. Washington, 1977, 26. [p.67, Fig.18, j-r].
Female (from SW Pacific-Antarctic area): j, habitus (lateral; scale bar: X); k, posterior of last prosomal segment and urosome (lateral; scale bar: Y); l, urosome (dorsal; scale bar: Y); m, left A2 (scale bar: Y); n, labrum (scale bar: Z); o, left Md (scale bar: Z); p, right Mx1 (scale bar: Z); q, right Mx2 (scale bar: Z); r, left Mxp (scale bar: Y).


Species Oncaea parila - Plate 4 of morphological figuresissued from : G.A. Heron in Antarct. Res. Ser. Washington, 1977, 26. [p.69, Fig.19, a-f].
Female: a-d, P1 to P4 (scale bar: Y); e, P5 (scale bar: Z, for a specimen: 0.65 mm); f, P5 (scale bar: Z, for a specimen: 0.63 mm).


Species Oncaea parila - Plate 5 of morphological figuresissued from : G.A. Heron, T.S. English & D.M. Damkaer in J. Crustacean Biol., 1984, 4 (3). [p.469, Fig.11, J-K].
Male (from Arctic): J, habitus (lateral; scale bar: v); K, posterior of last prosomal segment and urosome (lateral; scale bar: w).


Species Oncaea parila - Plate 6 of morphological figuresissued from : G.A. Heron, T.S. English & D.M. Damkaer in J. Crustacean Biol., 1984, 4 (3). [p.471, Fig.12, A-C].
Male: A, posterior of last prosomal segment and urosome (dorsal; scale bar: w); B, right Mxp (scale bar: x); C, P5 (scale bar: x).


Species Oncaea parila - Plate 7 of morphological figuresIssued from : O. Tanaka in Spec. Publs. Seto mar. biol. Lab., 10, 1960 [Pl. XXXII, 1-6]. As Oncaea notopus.
Female (from 66°59'S-67°04'S, 41°08'E-40°53'E): 1, habitus (dorsal); 2, last thoracic segments and abdomen (lateral); 3, A1.
Nota: Cephalothorax and abdomen in the proportional lengths 68 to 32.
Abdominal segments and caudal rami in the proportional lengths 50 : 14 : 7 : 15 : 14 = 100.
Genital segment 1.6 times as long as wide, swollen at the middle section.
Caudal rami twice as long as wide.
P5 slender and long, extends about to the level of the proximal 1/3 of the genital segment, and furnished with 2 apical setae and a proximal one.

Male: 4, habitus (dorsal); 5, head (lateral); 6, last thoracic segments and abdomen (lateral).
Nota: Cephalothorax and abdomen in the proportional lengths 68 to 32.
Abdominal segments and caudal rami in the proportional lengths 59: 5 : 3 : 3 : 15 : 15 = 100.
Genital segment about 1.2 times as long as beroad; lateral distal margin of the segment triangularly produced.
Caudal rami 1.7 times as long as broad.
P5 smaller in proportion to that of the female.

Immature female: 7, last thoracic segment and abdomen.

Compl. Ref.:
Metz, 1995 (p.190); 1996 (p.63, 87); Metz & Schnack-Schiel, 1995 (p.71, Table 1: C content); Razouls & al., 2000 (p.343, tab. 4, 5, Appendix); Nishibe & Ikeda, 2004 (p.931, Tab. 2, 4, 5); Bielecka & Zmijewska, 2005 (p.96); Nishibe & Ikeda, 2007 (p.609, vertical distribution, seasonal variations); 2008 (p.398, tab.1); Nishibe & al., 2009 (p.491, Table 1: seasonal abundance); Kosobokova & Hopcroft, 2010 (p.96, Table 1, fig.7); Kosobokova & al., 2011 (p.29, Table 2, figs.4, 7, Rem.: Arctic Basins)
NZ: 6

Distribution map of Oncaea parila by geographical zones
Species Oncaea parila - Distribution map 3issued from : G.A. Heron & B.W. Frost in Proc. Biol. Soc. Washington, 2000, 113 (4). [p.1060, Fig.24].
Locality records for selected species of Oncaea.
Records include previously published personal observations and data presented in this study (p.1023, Table 3).
Species Oncaea parila - Distribution map 4issued from : Y. Nishibe & T. Ikeda in Mar. Biol., 2007, 150. [p.620, Fig.11];
Oncaea parila. Vertical distribution of each developmental stage (C1-C6) at site H (41°30'N, 145°47'E, depth 6,670 m, in the Oyashio region).
Female and male data are shown separately for C4-C6.
Abbreviations are D day, N night.
Species Oncaea parila - Distribution map 5issued from : Y. Nishibe & T. Ikeda in Mar. Biol., 2007, 150. [p.612, Fig.2];
Vertical profiles of temperature (solid line) and salinity (broken line) at site H (41°30'N, 145°47'E, depth 6,670 m, in the Oyashio region).
Loc:
Antarct. (Bellingshausen Sea, Weddell Sea, off N Syowa, S Indian, SW Pacif.), Arct. (Nansen Basin, Amundsen Basin, Makarov Basin, Canada Basin), Norwegian Sea, Station 'P', NE Pacif., Washington inland, Japan (Tosa Bay, Oyashio region)
N: 14
Lg.:
(66) F: 0,68-0,63; M: 0,52-0,49; (134) F: 0,7; (675) F: 0,76-0,64; M: 0,58-0,5; (679) F: 0,73-0,61; {F: 0,61-0,76; M: 0,49-0,58}
Rem.: bipolar species.
Sampling depth (Antarct.) : 0-400-1000-2000 m. Subarctic: 500-1000 m.
For Heron & al. (1984, p.472), this species closely resembles O. damkaeri, O. prolata, O. walleni, in addition to O. notopus Giesbrecht, 1892 (not 1902). O. parila and O. notopus may be separated from the other three species by P5, with the two terminal setae lengths nearly equal. O. parila may be distinguished from O. notopus by relative differences in lengths of spines of the endopods and exopods of the swimming legs.
Last update : 26/01/2015
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Razouls C., Desreumaux N., Kouwenberg J. and de Bovée F., 2005-2021. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed November 27, 2021]

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